My aim is to extend the capabilities of ghc-mod to do case split. For that
matter, I'm using the GHC module of the ghc package (the same ghc-mod
uses). Via the exprType function I get a Type value. Then, I would like to
be able to call getInfo (everything from the GHC module) to get the
information of that type.
I'm not sure if using Template Haskell is something I can use, but I will
definitely try :)
2014-06-04 0:01 GMT+02:00 Nils Schweinsberg
I'm not sure what exactly you're trying to do, but with Template Haskell it's easy:
test :: Name -> Q [Dec]
test name = do info <- reify name ...
Then call it from another module with the type name as argument (double single quotes):
data Test = A | B
test ''Test
The `Info` type returned by `reify` is described in:
http://hackage.haskell.org/package/template-haskell-2.9. 0.0/docs/Language-Haskell-TH-Syntax.html#t:Info
- Nils
Am 03.06.2014 21:13, schrieb Alejandro Serrano Mena:
Dear Haskell-Café, As part of my Google Summer of Code, I need to get the list of data constructors of a certain data type on a specific scenario. In my case, I'm getting a value of type Type (by calling exprType). I was expecting to be able to call getInfo directly on that value of type Type, but it doesn't have a name nor the constructors of Type are public. Thus, I'm not able to get that information :(
Thanks in advance, Alejandro
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